2555545645 has 4 divisors (see below), whose sum is σ = 3066654780. Its totient is φ = 2044436512.

The previous prime is 2555545633. The next prime is 2555545673. The reversal of 2555545645 is 5465455552.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1587464649 + 968080996 = 39843^2 + 31114^2 .

It is a cyclic number.

It is not a de Polignac number, because 2555545645 - 2²¹ = 2553448493 is a prime.

It is a super-3 number, since 3×2555545645³ (a number of 29 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2555545595 and 2555545604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255554560 + ... + 255554569.

It is an arithmetic number, because the mean of its divisors is an integer number (766663695).

Almost surely, 2^2555545645 is an apocalyptic number.

It is an amenable number.

2555545645 is a deficient number, since it is larger than the sum of its proper divisors (511109135).

2555545645 is an equidigital number, since it uses as much as digits as its factorization.

2555545645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511109134.

The product of its digits is 3000000, while the sum is 46.

The square root of 2555545645 is about 50552.4049378464. The cubic root of 2555545645 is about 1367.1868758928.

The spelling of 2555545645 in words is "two billion, five hundred fifty-five million, five hundred forty-five thousand, six hundred forty-five".